Electric master-clock.



A. JARS. ELECTRIC MAsTER CLOCK. APPLICATION FILED MAY 5,1914.

Patented Nov. 24, 1914.

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IHE NORRIS A. JABS.

ELECTRIC MASTER CLOCK. APPLICATION FILED MAY 5,1914.

Patented Nov. 24, 1914.

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THE NORRIS PETERS 60.. PHOTO LlTHO-, \VASHINGI'UN, D, c

UNITED STATES PATENT OFFICE.

ASMUS JAIBS, OF ZURICH, SWITZERLAND.

ELECTRIC MASTER-CLOCK.

To all whom "it may concern:

.Be it known that I, AsMus JABS, a subject of the Emperor of Germany, and a resident of Zurich, Switzerland, have invented new and useful Improvements in Electric Master-Clocks; and I do hereby declare the following to be a full, clear, and exact description of the'invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying draw- 'ings, and to letters or figures of reference marked thereon, which form a specification.

This invention relates to improvements in the arrangement of the contacts of electric master-clocks.

part of this For the purpose of driving a large number of receiving or secondary clocks from an electric master-clock it has already been master-clocks according to this invention there is provided a current reverser-contact,'

which is rotated mechanicallv and continually by means of a clock-work actuated, for

instance, in a known manner by a weight. 'Within reach of the path of rotation'of the current reverser-contact there are provided contact-levers, some of which are electrically connected to a battery circuit, while the oth cm are electrically connected to the circuit of the secondary clocks. In the hitherto proposed master-clocksthere have been pro' vided as contact-pieces so called contact keys which were rotated only temporarily to 'clos'ethe contact and which afterward re 'mained stationary for a certain interval of time. The provision of a mechanically and continually rotated current reverser-contact has the advantage to secure-a uniform movement free of jerks and it permits of making veryshort contacts, so that no sparks are formed and the contacts can be kept longer closed. This current reverser-contact may be combined with means, which reduce the duration of thelcontact to a greater amount than the mechanical drive of the current,

reversencontact permits to reduce, for in stance, there may be piovided a second re;

volving, contact positively connected to said ,cer'reat rverseracontect. This coir Specification of Letters Patent.

Patented Nov. 24:, 1914.

Application filed May 5, 1914. Serial No. 836;;59.

tact moves then quicker than the current reverser-contact and it may be arranged in one of the two hereinbefore mentioned circuits, for instance in the battery circuit.

Several, modes of carrying this invention into effect are shown by way of example in the accompanying drawings, in which:

Figure 1 shows a front elevation of a first construction embodying my invention, Fig. 2 shows a side-view of this construction, Fig. 3 shows a plan-view of the current reverser-cont'act, Fig. 4 shows a section on the line A-B of Fig. 3, Fig. 5 shows a longitudinal section of said reverser-contact, Fig. 6 shows a front elevation of a second construction embodying my invention, Fig. 7 shows a side view of this second construction, Fig. 8 shows the connection scheme used in, these two constructions enibodying my invention, Fig. 9 shows a front elevation of a third construction according to this invention and Fig. 10 shows av corresponding elevation illustrating the different parts of this third construction in another position, Fig. 11 shows a side elevation of this third construction and Fig. 12'shows a section on the line CD of Fig. 11. Figs. 13 and 14 show the connection-scheme of this third mode of carrying out the invention for different positions of the current revers'encontact.

In carrying the invention into effect according to the construction as shown in Figs. 1 to 5 a toothed wheel 1 of the clock- Work which may be actuated for instance by a weight, drives mechanically a toothed wheel 2. c The bush 3 'of this toothed wheel 2 is loosely mounted on a shaft 4:. A pin 5 fixed to a lever 6 projects into'the space provided between the spokes ofthe wheel 2. The lever 6 is rigidly connected to a contactpiece W, which acts as'a current reverser. Said lever 6 and the current reverser-contact-piece W arerigidly connected to the shaft 4. The currentreverser-contact IV, which is more clearly illustrated in Figs; 3 to 5, has an insulating core 7 on both sides of which there are fixed electric current conducting sheet-irons 8 and 9. These sheets 8 and 9 are insulated from each other. The sheet 9 has at one end a tongue 10 and at the other end two tongues 11 and 12. The sheet 8 has at one end a tongue 13 and at the other end'two tongues 14 and 15. The tongue 10 of the 'sheet9 and the tongue 13 of the sheet s are arranged in one Straight.

line side by side just as also the tongues 12 and 11 of the sheet 9 and the tongues 14 and v 15 of the sheet 8 on the other end are in a straight line side by side. Two arms 16 (Fig. 2) are mounted on an enlarged part of the shaft. 4. The ends of these arms are connected by means of the parts 17. The arms 16 and the parts 17 form a frame-like armature, the longitudinal axis of which is arranged diagonally to the longitudinal axis of the current reverser-contact W (see Fig. 1). While the parts 17 are rotated they pass near the pole-shoes 18v of an electromagnet 19, which, as shown inFig. 8, is arranged in a separate circult 50. A circuit a is connected to said separate circuit :0, the

secondary clocks N being arranged in the circuits. Below therevolvingcontact WV there are disposed four contact-levers 21, 22, 23, 24, which are insulated one from another. Thecontact-levers 21, 24 form the ends of the battery circuit, while the contact-levers 22, and 23 form the ends of the separatefcircuit :0. These contact-levers are looselyand pivotally mounted on the shaft 20 and they are insulated .from this shaft.

The rear,heavier ends of said contact-levers '4, while the toothed wheel 2, between whose spokes projects the pin 5, is loosely mounted.

on the shaft 4. Owing to this arrangement, a rotation of thetoothed wheel 2 in the direction of the arrow shown in Fig. 1 causes a continual rotation of the reverser-contact W, because a spoke of the wheel 2 bears against the pin 5. As soon, however, as the circuit (Fig. 8) is closed in which case 1 the different members are in the position illustrated in Fig. 1, also the circuit as will be. closed and the electro-magnet 19 will then be excited. This causes-in the first placea transmission of a current impulse to the secondary clocks, N and secondlv the contact between the revolving pieces W and the levers 21 and 24 will be opened, since the armature part 17 lying nearer the poleshoe 18 will be quickly attracted by the electro-magnet 19 as soon as the circuit ac is closed. In this manner all the contacts are opened more quickly than would be the ca se'if the reverser-contact W were mechanically rotated by the toothed wheel 2. During this quick rotary motion of the shaft 4 the toothed wheel 2 will not be rotated. the

pin 5 having a certain amount of play between the spokes of the toothed wheel. 2.-

The toothed wheel 2 rotates farther without acting upon the shaft 4 till its spoke bears again against the pin 5. Hereupon the rotating contact will be continually rotated in a'mechanical manner till the next contactclosing takes place, a current impulse di-' rected in the reverse direction being then transmitted to the secondary clocks I.

In carrying the invention into efiect according to the construction as shown in Figs. 6 and 7 the contact-lever 24 has on its frontend a nose 26, over which may project, as will be hereinafter described, a lever 27 acted upon by a spring 28. On the shaft 4 there is further mounted a lever 29 having a 0 pin 30. The heavier, rear ends of the levers 21 to 24 rest on an arm 31 of a lever, which carries on its other end the armature 32. Shortly after the revolving contact N has reached the closing position shown in Fig. 6, 5 the electr c-magnet 19 will be excited, so that it attracts the armature 32. This has the effect to lower all the contacts 21 to 24. Hereby the nose 26 comes to rest below a nose of the lever 27, so that the lever 24 will not be moved upward when the current exciting the electro-magnet 19 is opened, butwill remain in the depressed position. As soon, however, as said pin 30 strikes against the lever 27, while the rotating contact WV is in the position to make contact with the levers 21 to 23, said lever is moved outward against the tension of the spring 28 and the lever 24 will then be moved toward the current reverser-contact XV, this being the pre liminary step toward the excitation of the electro-magnet 19 or toward the closing of y the circuit 3 v 1 According to the construction illustrated in Figs. 9 to 14 the rotating contact l/V is rigidly connected to a toothed wheel 33, receiving its drive from a clock-Work. A toothed wheel 34 gears into the toothed wheel 33. The diameter of the wheel 33 is a multiple of the diameter .of the wheel 34, for instance in the present case said diameter is four times greater than that of the wheel 34. A contact-piece 35 is connected to the toothed wheel 34, saidpiece 35 being rotated four times quicker than the current reverser-,. contact 'W. The. contact-piece 35 is, how-. ever, not arranged in a circuit and it serves only to connect electrically for a time two contact-pieces 37 and 38 by means of a pin 36 (see Figs. 13 and 14). These two con- 2 tacts 37, 38 form a breakiin the battery cir cuit 11 In this case no separate circuit a: is provided for. It will be evident that a closing of the contacts takes place only during each second revolution of the second contact-piece 35.- As shown in Fig. 9, the con-- tact piece 35 could also make contact during its first revolution, .but the current reverser-- contact W is not in the proper position for making contact, so that the contact made between the parts 36, 37 and 38 is in this case of no value. As shown in Fig. 10, contact will be made only during the following revolution, both the contact-pieces being then in the proper position required for making contact. As the speed of rotation of the contact-piece is a multiple of that of the current reverser-contact WV, the contact on the pieces W will accordingly be opened in a much quicker manner than the mechanical drive of the current reverser-contact W would permit to open. From the Figs. 13 and let it will be seen that according to the position of the reverser-contact W the current impulse transmitted to the secondary clocks will have a different-direction.

What I claim is:

1. In an electric master-clock, a current reverser-contact, means for mechanically and continually rotating said contact, contactlevers arranged within reach of the path of rotation of said reverser-contact, a part of said levers being arranged in a battery circuit and the other part in a circuit connected with secondary clocks.

2. In an electric master-clock, a current reverser-contact, means for mechanically rotating said contact, contact-levers arranged within reach of the path of rotation of said reverser-contact, a part of said levers being arranged in a battery circuit and the other part in a circuit connected with secondary clocks, and means for rendering the duration of the contact shorter than the mechanical drive for said current reverser-contact permits to make.

3. In an electric master-clock, a current reverser-contact, means for mechanically and continuaily rotating said contact in a uniform manner, contact-levers arranged within reach or" the path of rotation of the current reverser-contact, a part of said levers being arranged in a battery circuit and the other part in a circuit connected with secondary clocks, a second rotating contact positively connected to said reversencontact, the speed of rotation of the second contact being a multiple of that of the reverser-contact and said second contact being arranged in one of the two mentioned circuits.

a. In an electric master-clock, a current reverser-contact, means for mechanically and continually rotating said contact in a uniform manner, contact-levers arranged within reach of the path of rotation of the current reverser-contact, a part of said levers being arranged in a battery circuit and the other part in a circuit connected with secondary clocks, a second rotating contact positively connected to said reverser-contact, the speed of rotation of the second contact being a multiple of that of the reverser-contact and said second contact being arranged in the battery circuit.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

ASMUS J ABS.

Witnesses CARL GUBLER, ARNOLD LEHNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

